The Simpsons television series has used many interesting words and phrases over the years, the most famous of which is Homer\'s saying: "D\'oh!", which is referred to in scripts, as well as several episode names, as "annoyed grunt". D\'oh is now listed in the Oxford English Dictionary and even in smaller ones such as OUP\'s one volume Oxford Dictionary of English (second edition).
some quick ones:
BBBQA variation of the BBQ abbreviation for barbecue, Homer claims the extra B is for BYOBB. When Lisa asks what the extra \'B\' is for in BYOBB, Homer replies that it\'s a typo.
KwyjiboKwyjibo (IPA: /kwdibo/) is a fictitious word made up by Bart Simpson during a game of Scrabble with his family. In the episode "Bart the Genius", Bart puts "Kwyjibo" on the board and scores upwards of 150 points (50 of those points having been obtained by using all his letters). When Homer Simpson asks Bart what a Kwyjibo is, Bart replies, "A big, dumb, balding North American ape. With no chin." Marge Simpson adds in, "?and a short temper". At this point, Homer chases Bart away, causing him to exclaim, "Uh oh! Kwyjibo on the loose!" Humorously enough, earlier in that same episode, Homer moans words to the effect of "How could anyone form a good word out of these letters?" His Scrabble letters spell OXIDIZE, and were arranged in that order. The word would be worth a minimum of 74 points, including 50 points for using all his letters.
Kwyjibo acquired some later notoriety as an alias used by the writer of the Melissa worm.
Kwyjibo was also adopted as the name of a relatively advanced and popular yo-yo string trick in 1999 by Taylor Whitley, the trick\'s creator. The trick is often misspelled as Kwijibo, possibly as a result of a webboard poster who went by that handle.
TramapolinePronounced "tram-AP-o-leen", it\'s Homer\'s word, used in excitement, for Trampoline. It was coined in the episode Bart\'s Inner Child.
In the episode, Homer also used another variation, Trambopoline ("tram-BOP-o-line").
UnpossibleSpoken by Ralph Wiggum in the episode Lisa on Ice, as a pronunciation of "impossible."
(Upon Principal Skinner informing him that he\'s failing English class) Me fail English? That\'s unpossible!
Interestingly, "unpossible" appears in Shakespeare\'s Richard II, Act 2, Scene 2: Line 129[4].
The full list at wikipedia